• DocumentCode
    1198732
  • Title

    Compact nA/V triode-MOSFET transconductor

  • Author

    Lima, J. A De ; Serdijn, W.A.

  • Author_Institution
    Brazil Semicond. Technol. Center, Jaguariuna, Brazil
  • Volume
    41
  • Issue
    20
  • fYear
    2005
  • Firstpage
    1113
  • Lastpage
    1114
  • Abstract
    A simple nA/V CMOS transconductor for low-frequency gm-C filters is presented. To benefit from the lowest gm/ID ratio, input transistors operate in the triode region, with gm adjusted by their (W/L) and VDS, the latter a tuning-voltage replica. Since VDS surmounts the equivalent noise of the replica circuit, excellent control of gm is attained. Simulations support theoretical analysis. A 5Hz bandpass filter was designed, featuring SNR=59.2 dB for THD<1% at 150 mV and 17 nW consumption.
  • Keywords
    CMOS analogue integrated circuits; MOSFET; active filters; band-pass filters; equivalent circuits; 150 mV; 17 nW; 2.46 to 13.2 Hz; bandpass filter; equivalent noise; low-frequency gm-C filters; nA/V CMOS transconductor; replica circuit; triode-MOSFET transconductor; triode-region; tuning-voltage replica;
  • fLanguage
    English
  • Journal_Title
    Electronics Letters
  • Publisher
    iet
  • ISSN
    0013-5194
  • Type

    jour

  • DOI
    10.1049/el:20052551
  • Filename
    1522157
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=1198732